Types of changeover’s Direct changeover The old system is scrapped and immediately replaced by the new system. With this option there is a danger that there may still be problems with the new system. Even though it is the most risky type of changeover, many companies use this method.
Direct change =very fast change to new system Good= cheap, benefits are immediate, costs reduced (since only system is used there is no need to pay for two sets of staff) Bad = if there is a problem it all fails and can’t use old one in case
Phase changeover
The changeover is split into phases or stages. Each stage is introduced one at a time and the old system is kept running to do the remainder of the tasks that have not yet been changed.
Phase Change over=changes gradually to new system
Good=If one thing fails you can go to old again
Bad=Changes too quick on others, more expensive,
Parallel changeover Running both the old and new system until you are certain the new system is working correctly. Parallel running is likely to be the most expensive as it involves doing the work twice for a period of time. However, it is the safest. If there are any bugs in the new system, you can always go back to the old system while the problems are corrected.
Parallel change over=both happen at same time Good= if one crashes the other is still running, staff training is gradual, staff has time to get used to system
Old
Bad= double the work, more expensive than direct cause there is two systems running at same time
Direct changeover
The old system is scrapped and immediately replaced by the new system. With this option there is a danger that there may still be problems with the new system. Even though it is the most risky type of changeover, many companies use this method.
Direct change =very fast change to new system
Good= cheap, benefits are immediate, costs reduced (since only system is used there is no need to pay for two sets of staff)
Bad = if there is a problem it all fails and can’t use old one in case
Phase changeover
The changeover is split into phases or stages. Each stage is introduced one at a time and the old system is kept running to do the remainder of the tasks that have not yet been changed.
Phase Change over=changes gradually to new system
Good=If one thing fails you can go to old again
Bad=Changes too quick on others, more expensive,
Parallel changeover
Running both the old and new system until you are certain the new system is working correctly. Parallel running is likely to be the most expensive as it involves doing the work twice for a period of time. However, it is the safest. If there are any bugs in the new system, you can always go back to the old system while the problems are corrected.
Parallel change over=both happen at same time
Good= if one crashes the other is still running, staff training is gradual, staff has time to get used to system